KR101634236B1 - Acoustic Hybrid Earphone With Acoustic Filter - Google Patents

Acoustic Hybrid Earphone With Acoustic Filter Download PDF

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Publication number
KR101634236B1
KR101634236B1 KR1020150048962A KR20150048962A KR101634236B1 KR 101634236 B1 KR101634236 B1 KR 101634236B1 KR 1020150048962 A KR1020150048962 A KR 1020150048962A KR 20150048962 A KR20150048962 A KR 20150048962A KR 101634236 B1 KR101634236 B1 KR 101634236B1
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KR
South Korea
Prior art keywords
acoustic
speaker
sound
housing
filter
Prior art date
Application number
KR1020150048962A
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Korean (ko)
Inventor
이종배
문준혁
Original Assignee
크레신 주식회사
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Publication date
Application filed by 크레신 주식회사 filed Critical 크레신 주식회사
Priority to KR1020150048962A priority Critical patent/KR101634236B1/en
Application granted granted Critical
Publication of KR101634236B1 publication Critical patent/KR101634236B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/11—Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion

Abstract

The present invention relates to a hybrid earphone comprising: a housing having an accommodation space therein, wherein a source outlet hole for outputting sound to the outside is formed on the housing; a first speaker which is accommodated in the accommodation space of the housing, converts an electrical signal to sound, and outputs the sound; a second speaker which is accommodated in the accommodation space of the housing and outputs the sound in a direction different from that of the first speaker; a circuit board which provides the electrical signal to the first speaker and the second speaker; and a sound filter which is arranged between a rear surface of the housing and the second speaker and elongates a travel path of the sound which is outputted from the second speaker. The sound outputted from the second speaker is attenuated by the sound filter in any frequency bands. According to the present invention, since the sound is physically filtered without using an electrical element such as a capacitor, a resistor, etc., a size of the housing can be reduced and manufacturing costs can be decreased. Also, it is possible to minimize variation in frequency response characteristics due to the electrical element, a phase change of the sound, and sound quality degradation due to a sound loss, etc.

Description

Acoustic Hybrid Earphone With Acoustic Filter "

The present invention relates to an acoustic filter and a hybrid acoustic output apparatus to which the acoustic filter is applied.

2. Description of the Related Art [0002] In general, earphones are small-sized sound reproducing apparatuses that can be worn on a user's ear, and output sounds of respective frequency bands according to speakers mounted inside the housing.

However, in an earphone or a headphone having a single speaker, it is impossible to reproduce all the sounds of the audible frequency band at a constant sound pressure (SPL). Even if a sound pressure satisfactory at a specific frequency comes out, The quality of the sound can be changed.

Accordingly, by combining speaker units for sound reproducing means having different reproduction bands such as a woofer, a squawker, a tweeter, and the like, various speaker systems such as two way, three way, and multi way can be manufactured Respectively.

Accordingly, in recent years, a hybrid earphone (hereinafter referred to as "BA") driver unit, which is excellent for high-frequency reproduction, and a conventional dynamic driver unit for reinforcing the deficient bass reproduction of the balanced amateur driver unit , And this technique is disclosed in U.S. Patent No. 8,280,094 (In-ear Earphone, published Oct. 2, 2012).

However, in the earphone and headphone using a plurality of driver units as described above, a combination of a woofer, a squawker, a tweeter, etc. having different reproduction bands as described above is provided. To achieve this, a capacitor, So that different loudspeakers are output from the respective speakers using the filter circuit.

However, due to the electrical characteristics of the electric device, unfavorable changes in frequency response characteristics, changes in phase of sound, and deterioration in sound quality due to sound loss occur.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a speaker unit capable of outputting different frequency bands without using an electric device such as a capacitor and a resistor.

The above object can be attained by providing a speaker comprising: a housing having a housing space therein and having an acoustic output port for outputting sound to the outside; a first speaker accommodated in the housing space of the housing for converting an electrical signal into an acoustic output; A second speaker accommodated in a receiving space of the second speaker for converting an electrical signal into an acoustic signal and outputting the acoustic signal; a circuit board for providing an electrical signal to the first speaker and the second speaker; Wherein the acoustic filter includes an acoustic transducer for increasing a travel distance of sound output from the second speaker and then transmitting the acoustic transducer to the acoustic output port. have.

The acoustic filter includes an acoustic horn for receiving the sound output from the second speaker and an acoustic outlet formed at one side of the acoustic filter and connected to the acoustic output port, The acoustic transit path connects the acoustic horn and the acoustic discharge port to provide a path of sound output from the second speaker.

The total length of the acoustic transit passage is longer than the length of the linear distance from the acoustic transducer to the acoustic discharge outlet.

The acoustic filter may include an outer frame formed with a part of the outer circumferential surface extending outwardly and connected to the acoustic output port and an inner circumferential surface extending from the inner circumferential surface of the outer frame to an inner circumferential surface of the outer frame, And an inner frame provided with a predetermined interval and provided with the acoustic transit passage formed with the acoustic transducer and connected to the acoustic transducer.

The first speaker is provided as a balanced amateur (BA) driver unit.

The second speaker is provided as a dynamic driver unit.

Accordingly, by adopting the dynamic driver unit and the balanced amateur driver unit, the present invention can expect the effect of outputting the even pitch range from the low-frequency range to the high-frequency range.

At the same time, by filtering the sound with a mechanical structure without using an electric element such as a capacitor and a resistor, it is possible to reduce the size of the housing and the manufacturing cost.

Furthermore, it is expected that the effect of minimizing the change of the frequency response characteristic, the phase change of the sound, and the sound quality deterioration due to the sound loss by the above electric device can be expected.

1 is an exploded perspective view of a hybrid earphone according to an embodiment of the present invention.
2 is a cross-sectional view of a hybrid earphone according to an embodiment of the present invention.
3 is a view illustrating a second speaker and an acoustic filter according to an embodiment of the present invention.
4 is a front view of an acoustic filter according to an embodiment of the present invention.
5 is a view showing a linear distance from an acoustic horn to an acoustic outlet and a total length of the acoustic transit passage according to the embodiment of the present invention.
FIG. 6 is a diagram illustrating a frequency response characteristic of an output sound of a second speaker with and without an acoustic filter according to an embodiment of the present invention.

The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, in which the technical parts already known will be omitted or compressed for the sake of brevity.

The hybrid earphone according to the embodiment of the present invention may be provided including the housing 100, the first speaker 200, the second speaker 300, the circuit board 400, and the acoustic filter 500, Will be described with reference to Figs. 1-6.

≪ Description of hybrid earphone according to the embodiment of the present invention &

The housing 100 has a housing space and an acoustic output port 150 for outputting sound to the outside. The housing 100 includes an upper body 110, a lower body 120, a holder 130, (Not shown).

The upper body 110 is a component accommodating an upper portion of the second speaker 300. The upper body 110 is partially opened and the upper lid 111 is further provided for closing the upper body 110 At this time, the upper cover 111 may be made of a transparent material.

The lower body 120 is formed with a step 121 along the circumference of the inner circumferential surface to support the outer lower surface of the second speaker 121 and the acoustic filter 500 is seated inside the step 121.

The holder 130 is a component for fixing the second speaker 300 by coupling the upper body 110 and the lower body 120. In the embodiment of the present invention, The upper surface of the second speaker 300 is fitted in the groove, and an air inlet (not shown) is provided at one side.

The waveguide 140 is a component extending from the lower body 120 in the rear direction and formed with an acoustic output port 150 through which the sound output from the first speaker 200 is transmitted to the outside.

An earpiece 141 fitted to the outer circumferential surface of the waveguide 140 may be provided and may be made of a silicone material for a comfortable wear comfort of the user, Do.

In addition, according to the embodiment of the present invention, the first speaker 200 is provided on the acoustic output port 150 of the waveguide 140, but the present invention is not limited thereto, It is also possible that at least two passages are independently provided on the sound output port 150 so that the sound output from the second speaker 300 can be separated and output.

The length of the waveguide 140 is adjusted so that the end of the waveguide 140 is spaced apart from the sound output port 150 in the direction of the upper side of the lower body 120, (Not shown) for preventing foreign matter from flowing into the interior of the body 120 may be provided.

According to an embodiment of the present invention, the first speaker 200 is provided as a balanced amateur (BA) driver unit, and the first speaker 200 is a speaker And is provided on the acoustic output port 150 of the waveguide 140 as well.

In a balanced armature driver unit, a portion of the armature (armature) surrounded by the coil is located between the permanent magnets, so that the vibrating plate vibrates due to the magnetic field generated by the coil and the magnetic field generated by the permanent magnet on the armature Which is a type of transducer in which sound is reproduced. The diaphragm is made of a metal material.

The second speaker 300 is fixed to the step 121 formed in the lower body 120 of the housing 100 and outputs sound in a direction different from that of the first speaker 200.

The second speaker 300 is an element for converting an electrical signal into sound and outputting it. According to the embodiment of the present invention, the second speaker 300 is provided as a dynamic driver unit, Similarly, the outer lower surface of the second speaker 300 is supported by the step 121 formed in the lower body 120.

The second speaker 300 is a type of transducer in which a diaphragm connected to a center coil moving up and down in a magnetic field generated by a permanent magnet is used and an electric signal is converted into an acoustic signal by shaking of the diaphragm.

The circuit board 400 is connected to the cables and is connected to the first speaker 120 and the second speaker 130 in parallel, respectively, to supply electrical signals and power.

The acoustic filter 500 is provided between the lower surface of the housing 100 and the second speaker 300 so as to increase the travel distance of sound output from the second speaker 300, Is a component that attenuates some frequency bands of sound output from the second speaker (300).

Hereinafter, the description of the acoustic filter 500 according to the embodiment of the present invention will be described with reference to FIGS.

≪ Description of acoustic filter 500 according to the embodiment of the present invention >

As shown in FIGS. 1 to 2, the acoustic filter 500 is provided between the lower body 120 and the second speaker 300 to increase the travel distance of sound output from the second speaker 300 .

For this purpose, the acoustic filter 500 is formed on the surface contacting the second speaker 300 and includes an acoustic horn 510 for receiving the sound output from the second speaker 300, 150 and an acoustic transit passage 530 for connecting the acoustic transducer and the acoustic discharge port to provide a path of sound output from the second speaker 300.

3 to 5, the acoustic filter 500 is provided including an outer frame 500OF and an inner frame 500IF, and the outer frame 500OF is provided to the acoustic filter 500 Some of the outer circumferential surfaces extend to have an acoustic discharge port 520 in the outer direction and are connected to the acoustic output port 150 formed in the waveguide 140.

An inner frame 500IF extending inward from the inner circumferential surface of the outer frame 500OF is provided and has a predetermined gap between the inner circumferential surface of the outer frame 500OF and the outer circumferential surface of the inner frame 500IF, So that the passage 530 is connected to the sound receiving hole 510 formed at the center of the acoustic filter 500.

At this time, it is preferable that the acoustic transit passage 530 is provided separately from the accommodation space in the housing 100.

The structure of the acoustic filter 500 may vary depending on how much the acoustic output from the second speaker 300 is attenuated to a certain frequency band.

The distance between the inner circumferential surface of the outer frame 500OF and the outer circumferential surface of the inner frame 500IF, that is, the width of the acoustic transit passage 530, may vary depending on the implementation.

3 to 4, the acoustic transit passage 530 is formed in a spiral shape so that the length of the acoustic transit passage 530 can be maximized within a limited space, The acoustic transit passage 530 can be variously changed depending on the characteristics of the sound that the speaker 300 wants to output.

5, the total length L2 of the acoustic transit passage 530 is longer than the length L1 of the linear distance from the acoustic transducer 510 to the acoustic ejection port 520. As shown in FIG.

Generally, damping due to a mechanical structure is largely achieved in a high-frequency sound (that is, a sound wave having a frequency of about 10 kHz or more) compared with a low-frequency sound (a sound wave having a frequency of less than about 5 kHz) 300 has the effect of attenuating the sound of the high-frequency band as the sound is transmitted through the acoustic transit passage 530. This can be confirmed from the frequency response characteristic shown in Fig.

Therefore, by using the acoustic filter 500 of the present invention in place of the conventional filter using electrical elements such as capacitors and resistors, the acoustic band of the sound output from the first speaker 200 and the second speaker 300 can be distinguished A change in the frequency response characteristic, a change in the phase of sound, and deterioration in sound quality due to sound loss do not occur due to the electric element.

The embodiments disclosed in the present invention are not intended to limit the scope of the present invention and are not intended to limit the scope of the present invention. The scope of protection is to be construed in accordance with the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

100: Housing
110: upper body
111: upper cover
120: Lower body
121: step
130: holder
140: Wave Guide
141: Earpiece
200: First speaker
300: Second speaker
400: circuit board
500: Acoustic filter
500OF: outer frame
500IF: inner frame
510: Acoustic canal
520: sound outlet
530: acoustic pathway

Claims (6)

As a hybrid earphone,
A housing having a receiving space therein and having an acoustic output port for outputting sound to the outside;
A first speaker accommodated in the housing space and converting an electrical signal into an acoustic signal, the first speaker being a balanced armature driver unit;
A second speaker accommodated in the housing space and converting an electrical signal into an acoustic signal, the second speaker being a dynamic driver unit;
A circuit board for providing an electrical signal to the first speaker and the second speaker; And
And an acoustic filter for transmitting the sound output from the second speaker to the sound output port to attenuate the high-frequency sound of the second speaker,
Wherein the acoustic filter has an acoustic movement path for increasing a travel distance of sound output from the second speaker and then sending the increased distance to the acoustic output port,
The acoustic filter includes:
An acoustic horn formed on a surface contacting the second speaker to receive sound output from the second speaker; And
An acoustic discharge port formed at one side and connected to the acoustic output port;
Wherein the acoustic transit passage connects the acoustic transducer and the acoustic discharge port to provide a path for movement of sound output from the second speaker,
The acoustic filter includes:
An outer frame having an outer circumferential surface formed with a part of the outer circumferential surface extending in the outward direction and connected to the sound output port; And
The acoustic transducer is provided so as to have a predetermined distance from the inner circumferential surface of the outer frame and extending from the inner circumferential surface of the outer frame so that the acoustic transducer is connected to the acoustic transducer Inner frame;
≪ / RTI &
Wherein the outer frame and the inner frame are on the same plane. delete The method according to claim 1,
Wherein a total length of the acoustic transit passage is longer than a length of a linear distance from the acoustic water inlet to the acoustic discharge outlet. delete delete delete
KR1020150048962A 2015-04-07 2015-04-07 Acoustic Hybrid Earphone With Acoustic Filter KR101634236B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150048962A KR101634236B1 (en) 2015-04-07 2015-04-07 Acoustic Hybrid Earphone With Acoustic Filter

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Application Number Priority Date Filing Date Title
KR1020150048962A KR101634236B1 (en) 2015-04-07 2015-04-07 Acoustic Hybrid Earphone With Acoustic Filter

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KR101634236B1 true KR101634236B1 (en) 2016-06-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102053263B1 (en) * 2018-09-12 2019-12-06 이근형 Earphone having structure for improving quality of sound
KR102203295B1 (en) 2019-12-11 2021-01-14 부전전자 주식회사 Grill Integral type Low Pass Filter and Speaker Having The Same
KR20220039550A (en) 2020-09-22 2022-03-29 주식회사 이엠텍 Hybrid receiver having fixing bracket for drivers
US11528563B2 (en) 2020-09-22 2022-12-13 Em-Tech Co., Ltd. Hybrid receiver having fixing bracket for drivers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040080527A (en) * 2003-03-12 2004-09-20 엠엠기어 주식회사 Sound wave guide for headphone and headphone case using of it
KR20090106679A (en) * 2008-04-07 2009-10-12 이종배 Hybrid in-ear headphone
KR101427043B1 (en) * 2013-04-22 2014-08-05 이재명 Multiway earphone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040080527A (en) * 2003-03-12 2004-09-20 엠엠기어 주식회사 Sound wave guide for headphone and headphone case using of it
KR20090106679A (en) * 2008-04-07 2009-10-12 이종배 Hybrid in-ear headphone
KR101427043B1 (en) * 2013-04-22 2014-08-05 이재명 Multiway earphone

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102053263B1 (en) * 2018-09-12 2019-12-06 이근형 Earphone having structure for improving quality of sound
WO2020055167A1 (en) * 2018-09-12 2020-03-19 이근형 Earphone having structure for improving quality of sound
KR102203295B1 (en) 2019-12-11 2021-01-14 부전전자 주식회사 Grill Integral type Low Pass Filter and Speaker Having The Same
US11076229B2 (en) 2019-12-11 2021-07-27 Bujeon Co., Ltd. Grill-integrated low-pass filter and speaker including the same
KR20220039550A (en) 2020-09-22 2022-03-29 주식회사 이엠텍 Hybrid receiver having fixing bracket for drivers
KR20220039551A (en) 2020-09-22 2022-03-29 주식회사 이엠텍 Hybrid earphone with mic
US11528563B2 (en) 2020-09-22 2022-12-13 Em-Tech Co., Ltd. Hybrid receiver having fixing bracket for drivers

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